One of the most popular games to play with the primary children is the hot/cold activity. Choristers use various items or pictures to hide - sometimes with direct correlation to the song being taught - but you can never go wrong with a music note!
Any note clipart would work. I suggest one with a thicker stem, like a quarter note, or perhaps even use two 16th notes, like this one.
Also, it doesn't have to be black. Think of the colors in your primary room. Pick a color that isn't there or doesn't appear very often. Coloring the note a lesser-used color helps the kids to find the note easier.
What do you use for your hot/cold game? I'd love to hear your feedback! <3